I think you might be in over your head there.
The pushing mechanic and the differently coloured dice accomplished several things:
Adds risk to the roll
Adds a second chance to get a success
Shows what gets a Bane (attribute/skill/gear/magic) For self-harm or damaged gear purposes
You want to do the same thing with only one roll and with the same dice.
What I suggest is having a good think about how much risk you want in your game. Are Banes supposed to be counted as they appear or is there some form of activator?
To do it all with one colour dice could work if you have the rule that either 1. Any gear takes damage before the character or 2. The player can choose to either take the damage or damage the gear.
The base pushing roll mechanic is fine.
But in fact, for a sci-fi setting where technology has reached remarkable levels, it seems strange to me that the gears can be damaged so easily. So I am looking for an alternative method that does not affect the gear but only the character.